Yeh, I have heard of it. I think that people refer to it as the Maaras Hamachpella bus. You have to make a reservation but I don’t have the number anymore.
I went and really enjoyed it. It goes to Maaras Hamachpela for Shacharis, Kever Rochel for a little bit and (when I went) to the Kevarim of Rus and Yishai – which I thought was really cool! I highly recommend going.